Which choice tells the main causes of convection currents in the asthenosphere? question 5 options: density and temperature temperature and pressure density and weight weight and pressure

If it starts at rest, the angular velocity after 0.750 is 5.1. The symbol for angular velocity in SI units is s1.

When an object rotates or circles around an axis, its angular velocity is the rate at which the angle between the two bodies changes. The angle that is made by a line on one body and a line on the other in the illustration represents this displacement.

Examples of angular velocity include a roulette ball on a wheel, a race car travelling in a circle, and a Ferris wheel. In addition, the object's angular displacement with respect to time is represented by the angular velocity of the object.

Since the radian is a dimensionless quantity and the SI unit of angular velocity is radians per second.

Angular acceleration

a = a /r

 = 1.7/0.250

a =6.8

Angular velocity

omega = a*t

            = 6.8 *0.75

           =5.1

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The density of the of the olive oil, given that it has a mass of 690 grams and a volume of 750 cm³ is 0.92 g/cm³

We know that density is defined as mass per unit volume. It is expressed as:

Density = mass / volume

Thus, with the above formula, we can determine the density of the oliver oil as illustrated below:

Density = mass / volume

Density of olive oil = 690 / 750

Density of olive oil = 0.92 g/cm³

Therefore, we can conclude that the density of the olive oil is 0.92 g/cm³

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200 g mass is placed on meter stick 20 cm from fulcrum. a 170 g mass is used to balance the system and placed the meter stick at 23.52cm.

A dynamic or static equilibrium between opposing forces or actions, such as when forces are acting on a body and the resultant is zero (as in a reversible chemical reaction when rates of reaction in both the directions are equal)

The word "equilibrium" derives from the Latin word "libra," which means "weight" or "balance." As a constellation, astrological sign, and representation of the zodiac, Libra is sometimes shown as a set of balance scales, frequently held by the blindfolded goddess of justice, which stands for justice, fairness, and equality. Biology, chemistry, physics, and economics all have different definitions of equilibrium, yet they all refer to the harmony of opposing forces.

F₁d₁ = F₂d₂

m₁gd₁ = m₂gd₂

m₁d₁ = m₂d₂

here,

m₁ is mass of known object = 200 g

m₂ is mass of unknown object = 170 g

d₁ is distance from fulcrum of known object = 20 cm

d₂ is distance from fulcrum of unknown object = ?

∴ 200 × 20 = 170 × d₂

4000 = 170 × d₂

4000/170 = d₂

d₂ = 23.52 cm

170 g mass is placed at the distance of 23.52 cm.

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The tension must a rope withstand is 1296.42N

Given- Mass m=1054 kg

acceleration= 1.23 m/s²

To find Tension generated .

Principle -Tension is the reaction of the action applied that means due to application of mass along with acceleration there is a urge towards earth and to substantiate it or to form a couple the reaction occurred is tension that equalises the role of force,

Mathematically , Force = ma ⇒Tension

F=T

T=ma

Calculations & Answer - T= 1054 x 1.23

= 1296.42N

Since T=F so unit of force and tension will  be same.

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The total drag on the airplane is 97.28

define velocity?

Velocity is the rate of change in position of an object in motion as measured by a certain time standard (e.g., 60 km/h northbound). Velocity is a key notion in kinematics, the branch of classical mechanics that studies body motion.

weight of plane=5500lb

velocity=220m/h

=200x88/60

=292

wing area= 200 ft^2

aspect ratio=8.5

oswald efficiency (E)=0.93

density of air = 1.225Kg/m^3

=0.002377

Drag= 0.5xpxvxAxcd

lift coefficient=0.245

drag coefficient= 0.0024

cd=0.0024+0.0024=0.0048

drag= 0.5x0.002377x(292x292)x200x0.0048

=0.0011885x(85264)x200x0.0048

=97.28 lb

therefore the  total drag on the airplane was 97.28 lb

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The ratio of turns in the primary and secondary coils of her transformer is 1.916

Primary voltage = 230v

secondary voltage = 120v

The ratio of turns in primary and secondary coils of transformer is given by,

Np/Ns = 230/120

           = 1.916

Transformer: a piece of equipment used to increase or decrease voltage while transferring electrical energy from one alternating-current circuit to another or several circuits. Transformers are used for a wide range of tasks, including lowering the voltage of traditional power circuits to operate low-voltage appliances like doorbells and toy electric trains and raising the voltage of electric generators to enable long-distance transmission of electrical power.

Transformers alter voltage using electromagnetic induction, which means that current is induced in a second coil known as the secondary as the magnetic lines of force (flux lines) build up and collapse with changes in current travelling through the primary coil. To determine the secondary voltage, multiply the primary voltage by the number-to-number ratio. Transformers are devices that convert electrical energy from a single alternating-current turn in the secondary coil to the number of turns in the main coil, a measurement known as the turns ratio.

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Due to the fact that kinetic energy is proportional to the square of the speed, doubling the speed results in a four-fold increase in kinetic energy.

As a result, the object's kinetic energy doubles to become four times as much as its initial kinetic energy when its speed doubles.

Speed squared determines kinetic energy. The kinetic energy of an item increases by a factor of four with speed.

Because an object's motion is dependent on both its velocity and its mass, though velocity plays a larger role in motion.

Thus, the relationship between kinetic energy and mass and velocity is direct. Since kinetic energy is exactly proportional to both the square of velocity and mass, its value increases by an order of eight.

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The temperature at which the bar will fit exactly into a hole of constant width 10.005 cm if coefficient of linear expansion of steel is 11x10-6 C-1 is 95.5 °C

Δ L = L - Lo

Δ T = T - To

Δ L = Change in length

L = Initial length

Lo = Final length

α = Co-efficient of linear expansion

Δ T = Change in temperature

T = Initial temperature

To = Final temperature

L = 10 cm

Lo = 10.005 cm

T = 50 °C

Δ L = - 0.005 cm

α = 11 * [tex]10^{-6}[/tex] / °C

Δ L / L = α Δ T

Δ L / α L + T = To

To = ( - 0.005 ) / 11 * [tex]10^{-6}[/tex] * 10 + 50

To = 45.5 + 50

To = 95.5 °C

Therefore, the temperature at which the bar will fit exactly into a hole is 95.5 °C

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Answer:

The steel bar will fit exactly into the hole at a temperature of 95.45°C.

Explanation:

To find at what temperature the steel bar will fit exactly into a hole of a constant width, use the Linear Expansion equation.

[tex]\boxed{L_1-L_0=L_0 \cdot \alpha \cdot (T_1-T_0)}[/tex]

where:

As we want to find the final temperature, rearrange the equation to isolate T₁:

[tex]T_1=\dfrac{L_1-L_0}{L_0 \cdot \alpha}+T_0[/tex]

Given values:

Substitute the values into the equation:

[tex]\implies T_1=\dfrac{10.005-10}{10 \cdot 11 \times 10^{-6}}+50[/tex]

[tex]\implies T_1=\dfrac{0.005}{0.00011}+50[/tex]

[tex]\implies T_1=95.45^{\circ}\text{C}\; \sf (2\;d.p.)[/tex]

Therefore, the steel bar will fit exactly into the hole of  constant width 10.005 cm at a temperature of 95.45°C (to two decimal places).

Note: The answer is not one of the options provided.

The distance between the two masses of 10764 kg and 12008 kg, with a force of attraction of 0.00006 N cating on them is  36.99 m.

Distance can be defined as the length between two points.

To calculate the distance between the masses, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values intoe quation 1

Hence, the distance between the masses is 36.99 m.

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The answer is  99.5m/s

When the bullet strikes the wood it starts moving and due to cable its starts moving in circular motion so a centripetal force is generated towards the center  so we can write
T - mg = mv²/r

Given:
m = (20 + 0.9)kg
maximum T = 500N
r = 1.3m
so,
500 - (20.9)(9.8) = (20.9) v²/ 1.3
v² = 4.285m/s

so the speed of wooden ball and projectile is 4.285m/s
Now by conservation of momentum
     m₁v₁ = m₂v₂
(0.9)v = (20.9)(4.255)
v = 99.5m/s
So the safest speed of projectile is 99.5m/s

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If the car's speed is 50 mph the tires will rotate 11.68 times per second.

To calculate the rotation of the tire if

First, we have to calculate the radius of the wheel.

[tex]R =\frac{d_2 + d_1 + d_2}{2}[/tex]

[tex]R = \frac{4.75 + 14.5 + 4.75}{2}[/tex]

[tex]R = \frac{24}{2}[/tex]

R = 12 inches

Convert the linear velocity.

v = 50 mph

[tex]v = 50 \times \frac{1 \: miles}{1 \: hour}[/tex]

[tex]v = 50 \times \frac{63,360 \: inches}{3,600 \: s}[/tex]

v = 880 inches/s

Formula between angular velocity and linear velocity v = ω R

Calculate the angular velocity.

[tex]\omega = \frac{v}{R}[/tex]

[tex]\omega = \frac{880}{12}[/tex]

ω = 73.33 radians/s

Angular velocity has a conection with the frequency (how many rotations in second)
ω = 2πf

[tex]f = \frac{\omega}{2 \pi}[/tex]

[tex]f = \frac{73.33}{2 \times 3.14}[/tex]

[tex]f = \frac{73.33}{6.28}[/tex]

f = 11.68 rotations/second

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1. There are three forces.

2. Yes, the forces on the beam are balanced.

3. The magnitude of the net force on them is zero.

4. The tension in Cable 1 is 8,596.49 N

5. The tension in Cable 2 is 8,596.49 N

The forces acting on the beam are two tension forces due to the cable and one gravitational pull due to its weight. Thus, there are three forces acting on the beam.

The force on the beam is perfectly balanced as the cable is uniformly attached to it. The beam is moving with constant velocity, thus the acceleration is zero, and hence, the net force acting on it is also zero.

The tension, T, in both cables is equal as they are inclined at the same angle.

Now, we resolve them into rectangular components and write

Tsin35 +Tsin35 = mg = 1000*9.8 = 9800

2Tsin35 = 9800

Tsin35 = 4900

T*0.57 = 4900

T = 8,596.49 N

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To incubate the eggs, we need to use a low-efficiency light bulb because it will produce more heat.

The working light bulb in the incubator is when it turned on the machine the bulb lit up and the box got hot. When the temperature reaches 38 degrees Celsius, the sensor triggers the temperature controller to turn off the bulb. Therefore, the temperature of the box was kept up to a certain limit. Humidity in the box was maintained by a jar filled with water. Water was added daily to keep the humidity between 60% and 90%. Eggs were rotated twice daily to ensure that all sides of the eggs were hatched. This buildup was monitored for up to 22 days.

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Kinetic energy, which can be seen in the movement of an object, particle, or group of particles, is the energy of motion.

energy KE = units

mass m =  15

velocity v =  30

KE = 6750 J

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Plumb-line method By hanging an item from several places and marking the vertical line with a plumb line, you can empirically determine where an object's center of gravity is located.

The object's center of gravity is where two or more vertical lines converge at a point on the plumb line.

A plumb line is a string that hangs perpendicular to the earth's surface with a large weight attached to it. The center of mass of the object will be traversed by a line drawn parallel to the plumb line. Draw a line along the second plumb line after repeating the process with a different attachment point.

Rub a rope through colored chalk to create a plumb line, then tack it to the top of the wall. Then secure the loose end with a plumb bob (or other tiny weight). Pull the cord taut while maintaining the bob's natural position of falling.

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Taking into account the definition of density, the density of the liquid is 0.8 g/cm³.

Density is defined as the property of matter, whether solid, liquid, or gas, that allows the amount of mass in a given volume of a substance to be measured.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

It can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, you know that:

Replacing in the definition of density:

density= 40 g÷ 50 cm³

Solving:

density= 0.8 g/cm³

In summary, the density in this case is 0.8 g/cm³.

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Answer:

The SI unit for the electric for is

A) Coulomb

27m./s speed do a bicycle and its rider, with a combined mass of 120 kg , have the same momentum as a 1800 kg car traveling at 5.4 m/s.

Speed can be defined as the distance travelled by the object per unit time. Momentum can be defined as the product of the mass and the speed of the object.

The equation for the momentum is     p = mv

Here, m is the mass of the object and v is the speed of the object. The equation for the impulse is,                 I = mΔ v

Here, m is the mass and is the change in momentum. The equation for the change in speed is                      

Here,   ΔV = [tex]V_{f} -V_{i}[/tex]

is the initial speed [tex]v_{i}[/tex]

is the final speed.[tex]v_{f}[/tex]

Step: 1

The equation for the momentum of the bike and rider is, P (B+R)= M [tex](B+R)^{V}[/tex]…… (1)

Here, M (B+R) is the mass of the bike and rider, and v is the speed of the bike and rider.

The equation for the momentum of the car is [tex]P_{car} = m_{car} V_{car}[/tex]…… (2)

Here,

[tex]m_{car }[/tex]is the mass of the car and

[tex]V_{car}[/tex]is the speed of the car.

According to the question, the momentum of the bike and rider is the same as that of the momentum of the car, that is,

Substitute the equations (1) and (2) in above equation.

[tex]M_({B+R^{v} )}[/tex]= [tex]M_{car}V_{car}[/tex]

Rearrange the above equation for v.  v = [tex]M_{car}V_{car}[/tex]/[tex]M_({B+R^{} )}[/tex]

Substitute  1800 kg for[tex]M_{car}[/tex] , and for 5.4m/s in above equation.

v = ( [tex]\frac{(1800) (5.4)}{120}[/tex] = 27m./s

Here, the momentum of the bike and rider is depending on the combined mass of the bike and rider and the speed of the bike and raider.

Measurement is the most important concept in science. There are many measurable quantities that are measured in basic or fundamental physical  units. Speed ​​is one such measurable quantity that measures the ratio of the distance travelled by an object to the time it takes to travel. Acceleration is defined as the rate of change of velocity with respect to time. Acceleration is a vector quantity because it has both magnitude and direction. It is also the second derivative of position with respect to time or  the first derivative of velocity with respect to time.

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The outer core of Jupiter, which is made up of liquid metallic hydrogen, is where electrical currents originate that create the planet's internal magnetic field.

The third layer of the Earth is its outer core. Iron and nickel, together with trace amounts of other materials, make up the majority of this layer, which is the only one that is liquid. The Earth's magnetic field is created by the outer core. The iron inside the liquid outer core of Earth flows about as it rotates on its axis.

Above the solid inner core of the Earth and below its mantle is a liquid layer made of iron and nickel that is about 2,261 km thick. Its outer boundary is located 2,890 km (1,800 mi) below the surface of the Earth.

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Since the kinetic energy equation squares velocity, velocity increases have exponential effects: while doubling an object's mass doubles its kinetic energy, doubling its velocity quadruples it!

The energy of motion, or kinetic energy, is manifested in the motion of a particle, an object, or a group of particles. Kinetic energy is used by any moving thing, including people moving, baseballs being thrown, table crumbs falling, and charged particles in electric fields.

Kinetic energy is divided into three subtypes: vibrational, rotational, or translational. Unsurprisingly, items that vibrate produce vibrational kinetic energy. Moving objects generate rotational kinetic energy, whereas object collisions generate translational kinetic energy.

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Lying on a bed of nails is one of the most traditional illusions used by magicians. At first glance, it appears like the person lying in the bed of nails will have a hole pierced through their back.

Lying on a bed of nails is one of the most traditional illusions used by magicians. At first glance, it appears like the person lying in the bed of nails will have a hole pierced through their back. According to physics, a force exerted downward will be dispersed across the nails, lowering the force that each nail applies individually. The force that each nail exerts decreases with the number of nails.

Given

m=79.2 kg The mass of the Physics Professor

n=1950

The Number of Nails in the Bed of Nails

Solving for the weight of the professor applied to the board of nails

W=mg

W=(79.2 kg)(9.8 ms2)

W=776.16N

Solving for the force applied by the individual nails.

Fn=Wn

Fn=776.16 N1950Fn=0.398

N Therefore each nail applies 0.398 N of force.

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A proton will accelerate at 1.27 109 m/s2. The rate of a change in velocity is called acceleration.

It is the kind of field that produces magnetic force. use a magnetic field to assist. The field that is sensed around a moving electric charge is how the magnetic force is measured.

The information provided in the issue is;

What is a proton's acceleration equal to?

The speed is 8.0 m/s, therefore v.

B = 1.8 T is the magnetic field.

The centripetal force and the megnetic force are equivalent;

qvB =m v/r

ac = 1.6 * 10 -18* 9.5* 1.8/1.67810-27

=1.27*10m/s

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The highest rate of speed a person can reach is called maximum speed.When athletes alter the magnitude or direction of their motion, or both.

The maximum speed the stone can attain is 8.366 m/s

Data;

   Mass = 10kg

   radius of tangential path = 7m

   Tension = 100N

Centripetal Force

The centripetal force of the stone can be calculated as

Fe =mv/r

v² = Tr/m

v=√Tr/m

v=√100*7/10

v=8.366 m/s

The tension acting on the string is given as

The maximum speed the stone can attain is 8.366m/s

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0.00048 rad/s should be the angular velocity of the cylinder to produce a 1-g gravitational field at the walls of the cylinder.

The following problem requires understanding angular velocity and centripetal acceleration to obtain the result. The angular velocity of a body is defined by its virtue of velocity at a particular angle on an axis.

Centripetal acceleration is acceleration when the body is rotating and that acts towards the midpoint of the circular movement.

centripetal acceleration = rω² (derived from v²/r)

here

ω = angular velocity of the cylinder

r = radius of the space colony = 13km / 2 ⇒ 6.5km or 6500m

Substituting the values,

a = g ⇒ 9.8m/s²

ω = √9.8 / 6500 = 0.00048 rad/s

∴The cylinder should rotate at 0.00048 rad/s for producing a 1-g gravitational field.

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The pressure of the gas in the rigid container is doubled, then the temperature will also increase by two times.

According to ideal gas equation,

PV = nRT

Where, P is pressure, V is volume, n is the moles, T is temperature of the gas and R is the gas constant.

A certain volume of gas is put in the container means that the volume and the mole of the gas are constant so, we can write,

PV = Constant,

P₁/T₁ = P₂/T₂

Let us say that P₁ and V₁ are initial parameters, If the volume of the container is doubled, then, P₂ = 2P₁,

So,

P₁/T₁ = 2P₂/T₂

T₂ =  2T₁.

So, the temperature of the gas will be increase by two times,

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Answer:

The answer is 9.32x10^(-6) T.

Explanation:

The formula of finding magnetic field in a long solenoid is (B)= (MU)X N X I/L.

MU=4*(PI)*10^-7 h/m

n=1255

i=4.2 A

l=0.71 m

b= 9.32*10^(-6) T.

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The image screen is 10.5 cm from the lens.

The focal length of the lens is 10.0 cm, so once the lens focuses, it will be 10.0 cm from the object. In order to find how many centimeters away from the lens the image screen is, we need to use trigonometry and Pythagorean theorem.

Where x is the distance between our object and our projector in meters, and y is the distance between our projector and our image screen in meters. We know that y = 10.5 cm, or 0.105 m; we also know that x = 0 meters because our object is placed directly on top of our projector (therefore it's at 0 m).

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An example of an anomaly that led to a theory being overturned is: The discovery that materials, when burned, release phlogiston.

A theory can be defined as an integrated set of principles and rules that can be used by a scientist to explain and predict observed events.

According to Thomas Kuhn, the process of any scientific discovery usually starts with the awareness of an anomaly and ends with making an adjustment to scientific theory in order to make a previously anomalous to become expected.

The phlogiston theory can be defined as a superseded scientific theory which stated that a fire-like materials (elements) referred to as phlogiston, are found within combustible bodies and they are released when burned or during combustion.

However, the phlogiston theory is an anomaly that was later overturned by a scientists known as Antoine Lavoisier in 1772, who proved that combustion and burning of any chemical substance or materials (elements) requires a gas that has mass.

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Answer:Physical

Explanation:

Answer:

physical change

Explanation:

Making a fruit salad, with raw fruits is considered as physical change because in this process chemical composition of fruits is not changed. It is simply changing the shape of the substance.

If a student wants to collect data during an experiment about the transfer of kinetic energy in a sample of water and ice, then the tool that will help her collect the necessary data is a thermometer.

A thermometer is a device used in different applications in order to measure the temperature in the surrounding environment and or open systems such as organisms (including humans).

Therefore, with this data, we can see that a thermometer can be used to determine the temperature of an organism and also of the surrounding media.

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Answer:

your answer will be thermometer

Explanation:

if you go to connexus and are doing the science

Thermal Energy Unit Test 10 qestions 8th grd unit 5 test lesson 12 here are the correct answers

1. A. metal is heated from room temperature to 200'C.

2. B. The particles will have more space between them as steam, but they will be moving at the same speed in both states.

3. C. The potential energy decreases due to the tighter arrangement of the particles.

4. B. an increase in heat and an increase in kinetic energy until a phase change occurs.

5. C. thermometer

6. B. 4.

7. D. convection

8. C. Air moves from the areas of higher temperature to areas of lower temperature.

9. C. The temperature of the ice increases, while the temperature of the water decreases

10. A. heat transfer by radiation.

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